diff --git docroot/.htaccess docroot/.htaccess
index 27e18a0..03eabf5 100644
--- docroot/.htaccess
+++ docroot/.htaccess
@@ -149,6 +149,8 @@ AddEncoding gzip svgz
   RewriteCond %{REQUEST_URI} !/core/[^/]*\.php$
   # Allow access to test-specific PHP files:
   RewriteCond %{REQUEST_URI} !/core/modules/system/tests/https?.php
+  # Allow access to simplesaml paths.
+  RewriteCond %{REQUEST_URI} !^/simplesaml
   # Allow access to Statistics module's custom front controller.
   # Copy and adapt this rule to directly execute PHP files in contributed or
   # custom modules or to run another PHP application in the same directory.